Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 37)

❏ ❏
7. Use a metal file to chamfer the edges and corners
of the aluminum landing gear so it will neatly fit in the
recess of the wheel pant. Position the wheel pant on the
aluminum landing gear. Drill a 3/16" hole through the wheel
pant using the landing gear as a guide.
❏ ❏
8. Drill a 3/16" hole through the outside of the wheel
pant using the inside hole as a guide. Enlarge the hole to
1/4" so the head of the 8/32 bolts, provided for axles will fit.
Note: It is not necessary to drill the hole perfectly straight
across from the first hole, but you should try to be close.
❏ ❏
9. Most 2-3/4" wheels are made to fit 5/32" axles, but
the 8-32 bolts supplied in this kit for the axles require a
larger hole. If the wheel does not roll freely on the 8-32 x 1-1/2"
bolt “axle,” enlarge the wheel hub with an 11/64" (#18 for
perfection) drill.
❏ ❏
10. Test fit the wheel in the wheel pant using the following
procedures:
❏ ❏
A. Set the wheel in the wheel pant.
❏ ❏
B. Insert the 8-32 x 1-1/2" bolt “axle” part way into the
wheel through the 1/4" hole in the outside of the wheel
pant. Hold an 8-32 nut with a needle nose pliers inside the
wheel pant. Use a 9/64" hex wrench to screw the axle
through the nut and through the wheel pant mount.
❏ ❏
C. Adjust the tightness of the nut with a hemostat or
needle nose pliers.
❏ ❏
11. Temporarily mount the wheel pant to the landing
gear with another 8-32 nut on each axle.
❏
12. Perform the same procedure to assemble and
temporarily mount the other wheel pant to the landing gear.
❏
13. Before painting the wheel pants, fill the seams with
putty filler such as Squadron ® White Putty or resin filler
such as Bondo ® . We use Bondo most of the time as it cures
quickly and is easy to sand, but usually it must be
purchased in large quantities. Squadron putty works well
but it takes overnight to dry and usually requires at least
two applications because it shrinks as it dries.
37